At NJ-Hi railers we build the TMCC signal car with a bluetooth meter and took readings of all our lines and ran diesel & steam engines to find out what reading the majority of our engines need without running into weak signal/blinking head light issue. We came up with a meter reading of low to mid 40 ua for steam engines to run correctly. Most diesels needed less signal due to non metals bodies. With that information the team used a buffer and ran ground wires where needed to get signal readings in the 40'S. If there were non metallic engines with poorly designed antennas, we updated the engines antenna by replacing the 2" factory antenna with a 12-14" copper strip. These efforts have resolved the vast majority of our TMCC signal issues with club members. Hopefully this helps.
Bob D
